Finding Mr. Claus
To use Christmas magic, the rules say there must be two Claus's. Traditionally, Santa had his Mrs, but Chris isn't interested in a Mrs. But rules are the rules and Chris must bring in a second Claus.
Gavyn is a perfect fit for a temporary fix.
Their arrangement is set. Temporary, a loophole, short term, just for now, only till he finds someone better. There is no reading in between the lines. Gavyn is simply there to be the second Claus and nothing more.
But what happens when they both find something in each other they hadn’t known they were looking for? Gavyn might be the perfect wrapped present and Chris the Daddy Gavyn has always longed for.